What seems like the simplest form of birth control and protection from sexually transmitted disease, condoms are actually more complicated than we thought.

“We chronically underestimate how complicated condom use can be,” University of Kentucky professor Richard Crosby, who co-authored the study, said in a statement. “It involves the use of a condom, while negotiating the condom use and sex with a partner all at the same time.”

With perfect use, condoms prevent pregnancy with 98 percent success, according to the World Health Organization. Typically, however, the rate of unintended pregnancy with condoms is around 15 percent.

With proper use, condoms offer excellent protection from disease and unwanted pregnancy.

Condoms are also a highly affordable form of protection with little to no side affects which are available to everyone.